Your chat messages, notes, albums, and photos will not be deleted if you leave a group. If there is anything you want to delete, make sure to do so before leaving the group.
When a group member deletes their account or leaves the group, a message appears saying "XXXX left the group."
To leave a group:
1. Tap the menu icon at the top of the group chat screen > Leave.
2. Tap OK.
If every member leaves, all of the content posted in the group will be deleted and cannot be restored.